{
  "dataset": "gem-global-active-faults",
  "title": "GEM Global Active Faults Database \u2014 GeoParquet",
  "description": "Standardized GeoParquet conversion of the GEM Foundation's Global Active Faults Database (GAF-DB), preserving original fault geometries, kinematic and slip-rate attributes, and reference/provenance information.",
  "source": {
    "name": "GEM Global Active Faults Database (GAF-DB)",
    "publisher": "Global Earthquake Model (GEM) Foundation",
    "repository": "https://github.com/GEMScienceTools/gem-global-active-faults",
    "source_file_url": "https://raw.githubusercontent.com/GEMScienceTools/gem-global-active-faults/master/geojson/gem_active_faults.geojson",
    "citation": "Styron, R. and Pagani, M. (2020). The GEM Global Active Faults Database. Earthquake Spectra, 36(1_suppl), 160-180."
  },
  "license": "CC BY-SA 4.0",
  "transformation": {
    "date_utc": "2026-08-31T08:41:12.790621Z",
    "pipeline": [
      "download source GeoJSON",
      "standardize column names (snake_case) and text fields",
      "enforce CRS EPSG:4326",
      "validate and repair invalid geometries (make_valid)",
      "check duplicates and null attribute integrity",
      "write GeoParquet",
      "round-trip validation"
    ],
    "notes": "Representation-only transformation. No geological reinterpretation, slip-rate estimation, or new attributes introduced."
  },
  "format": "GeoParquet",
  "crs": "EPSG:4326",
  "row_count": 16195,
  "bounding_box": [
    -180.0,
    -66.163,
    179.999999,
    86.805
  ],
  "geometry_types": {
    "LineString": 16195
  },
  "schema": [
    {
      "field": "accuracy",
      "dtype": "object"
    },
    {
      "field": "activity_confidence",
      "dtype": "object"
    },
    {
      "field": "average_dip",
      "dtype": "object"
    },
    {
      "field": "average_rake",
      "dtype": "object"
    },
    {
      "field": "catalog_id",
      "dtype": "object"
    },
    {
      "field": "catalog_name",
      "dtype": "object"
    },
    {
      "field": "dip_dir",
      "dtype": "object"
    },
    {
      "field": "downthrown_side_dir",
      "dtype": "object"
    },
    {
      "field": "downthrown_side_id",
      "dtype": "object"
    },
    {
      "field": "epistemic_quality",
      "dtype": "object"
    },
    {
      "field": "exposure_quality",
      "dtype": "object"
    },
    {
      "field": "fs_name",
      "dtype": "object"
    },
    {
      "field": "last_movement",
      "dtype": "object"
    },
    {
      "field": "lower_seis_depth",
      "dtype": "object"
    },
    {
      "field": "name",
      "dtype": "object"
    },
    {
      "field": "net_slip_rate",
      "dtype": "object"
    },
    {
      "field": "notes",
      "dtype": "object"
    },
    {
      "field": "reference",
      "dtype": "object"
    },
    {
      "field": "shortening_rate",
      "dtype": "object"
    },
    {
      "field": "slip_type",
      "dtype": "object"
    },
    {
      "field": "strike_slip_rate",
      "dtype": "object"
    },
    {
      "field": "upper_seis_depth",
      "dtype": "object"
    },
    {
      "field": "vert_sep_rate",
      "dtype": "object"
    },
    {
      "field": "geometry",
      "dtype": "geometry"
    }
  ],
  "file": {
    "name": "gem_active_faults.parquet",
    "sha256": "e44ce49633db14a5edadf00f3b4f4887f71ac3a6a0847ceab0709f3125212694",
    "size_mb": 3.098
  }
}